Scarlett Johannson's twin brother Hunter worked as a campaign organizer for President Obama. At the age of 12, Scarlett and Hunter appeared together in the 1996 film "Manny & Lo." —XFINITY Entertainment Staff (Photo by Alex Brandon/AP)

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"Napoleon Dynamite" actor Jon Heder (left) has an identical twin brother named Daniel (right). "We caused a lot of trouble by pretending to be the other," Heder told David Letterman. "The memories still give me a good chuckle." The brothers own Greasy Entertainment, a movie production company.—XFINITY Entertainment Staff (Photo by David Livingston/Getty Images)

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Actress and director Isabella Rossellini (left) has a twin sister named Ingrid (right), who previously worked as an Italian literature professor at New York University. —XFINITY Entertainment Staff (Photos by Getty Images)

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Ashton Kutcher's fraternal twin brother Michael, who suffers from cerebral palsy, works as a spokesperson for the advocacy group Reaching for the Stars. —XFINITY Entertainment Staff (Photos by Julien M. Hekimian/Getty Images, Twitter)

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Giovanni and Marissa Ribisi aren't just talented actors, they are also fraternal twins. The siblings were delivered by former actress Bibbe Hansen, who happens to be the mother of Marissa's husband, musician Beck. Small world. —XFINITY Entertainment Staff (Photo by Charley Gallay/Getty Images)

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Former "Law and Order" actress Jill Hennessy (left) has an identical twin sister named Jacqueline (right), who works as a magazine writer and television host in Canada. —XFINITY Entertainment Staff (Photo by Joe Scarnici/Getty Images)

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Actors Jason (left) and Jeremy (right) London rose to fame in the 1990s, and there's a good chance you thought they were the same person. Jason, best known for his role as Randall "Pink" Floyd in "Dazed and Confused," is 27 minutes older than Jeremy, who starred in the series "Party of Five." —XFINITY Entertainment Staff (Photos by Getty Images)

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Action star Vin Diesel, born Mark Sinclair Vincent, has a fraternal twin brother named Paul Vincent, who works as a film editor. The latter is rarely seen (or, at least, recognized and photographed) in public. —XFINITY Entertainment Staff (Photo by Carlos Alvarez/Getty Images)

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While Aaron Carter's most famous sibling is Backstreet Boys singer Nick, it's his model twin sister Angel who helps him make this list. Aaron is just two minutes younger than his female counterpart. —XFINITY Entertainment Staff (Photo by Chad Buchanan/Getty Images)

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Shawn Ashmore (left) and his twin brother Aaron (right) have appeared together as twins in a couple films, but they're better known for their separate projects. Shawn stars as Bobby "Iceman" Drake in the "X-Men" franchise, while Aaron is best known for his role as Jimmy Olsen in "Smallville." —XFINITY Entertainment Staff (Photos by Getty Images)

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